Thermal motor.



A. G. SOHWIETBRMAN.

' THERMAL MOTOR. APPLICATION FILED MARJ, 1914.

ggfigg I Patented July 21,1914.

2 SHEETS-SHEET l. 1 "Fig.1. g

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A. G. SCHWIETERMAN.

I THERMAL MOTOR. APPLIQATIION FILED MAR. 5, 1914.

Patented July 21, 1914.

2 SHEBTS-SHEET 2.

AUGUST G. SCHWIETEBMAN, OF DAYTON, OHIO.

THERMAL MOTOR.

Specification of Letters Patent.

Patented July 2i $91M.

Application filed March 5. 1914. Serial N4). 822,614.

T 0 all whom it may concern Be it known that 1. AUGUST G. SCHWIE- TERMAN, acitizen of the United States, residing at Dayton, in the countyof Montgomery and State of Ohio, have invented certain new and useful Improvements in Thermal Motors; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings. and to the letters and figures of reference marked thereon. which form a partof this specification.

This invention relates to new and useful improvements in thermal motors adapted to be actuated or influenced by the differences in atmospheric temperature.

The object of the invention is to provide a device of this type which is simple in construction and etlicient in operation, and particularly adapted for winding clocks. It is to be understood, however. that its uses are not limited to that application alone. as the device is capable of furnishing power for other small or comparatively small objects.

Referring to the accompanying drawings illustrative of my invention, Figure l is a rear elevation of a clock to which my improved thcrmal motor is applied; Fig. 2 is a side elevation of the same partially in section; Fig, 3 is a. section on the line aa of Fig. 1 showing the interior construction of the motor; Fig. 4 is a section on the line b- -b of Fig. 3; Fig. 5 is'an enlarged detail sectional view of the return valve of the motor; Fig. 6 is an enlarged detail view of the motor piston; Fig. 7 is a vertical sectional view through the winding drum; Fig. 8 is a detail view of the winding drum ratchet; and Fig. 9 is a detail view of the winding drum spring.

Throughout the specification and drawings, similar reference characters indicate corresponding parts.

Referring more particularly to the drawings, 1 represents a clock casing in which a clock 2 is mounted. The clock, in this instance, is provided with two key-spindles 3 which are each connected to a winding drum constructed as follows: Each winding drum consists of side plates 4 which are connected by rods 5 which form a supporting frame. The supporting frame is attached to the back of the clock casing 1 by suitable brackets (3. Jonrnaled in suitable bearings T in the plates l is a winding spindle 8 connected to its respective key-spindle 3 by a flexible coupling 9. Rigidly secured to said. winding spindle 8 is a ratchet 10 adapted to be engaged by a. pawl 11 mounted on a spool 12. The spool 12 is freely journaled on the spindle 8 and is under the influence of a spiral spring 13 one end of which is attached to the spool while the other end is attached to one of the plates 4. The spring 13 is adapted to rotate the spool 13 in one direction, whilethc said spool is rotnted in the opposite direction by a weight 14 attached to a cord 15 which winds around the spool 12. Under the influence of the weight 14. the spool 12 is rotated to turn the. key-spindle 3 through the agency of the coupling 9 and ratchet 10 to wind up the clock. \Vhen the weight 14: is subsequently elevated. the cord 15 is wound upon the spool by the spring 13. The cords 15, there being one for each key-spindle 3. are provided with guides 16 which hold the weights 14 in a true vertical path. To elevate said weights 14 to permit them to subsequently wind the clock, the following thermal motor is provided.

Mounted in the base of the clock casing l is a cylinder 17 in which an inner piston cylinder 18 is mounted. Mounted in the cylinder 18 is a piston 19 provided with suit able packing 20. The piston 19 is attached to the lower end of a piston rod '21 which extends upwardly through the cylinder 18 and through a 'packimc gland Mounted on the upper end of said piston rod 21 is a weighted cross-head provided with antifriction rollers 24 which roll on guides 25. hen the piston 19 is elevated in its cylinder 18, the cross-head 23 picks up the, weights l4 and elevates them to a position where they may subsequently fall by gravity and to thus rewind the clock. The cylinder 18 is mounted in a plug .25 screw-threaded into the top of the cylinder 17. Above the top of said cylinder 17 is a cap 2/? providing! a reservoir with a packing gland "28 through which the cylinder 18 extends. The reservoir provided by the cap 27 commiuiicates The ammmt 9:5 mnvemeut m 05 L wili be inexact prpor 101i to gmpemture of the fiquic'i 35 varying tamperazura i :1 which the moinr is firmvings 'i Ur to {L clack 0 m1- 1s achp 6% t0 meta cyfiim cum of under 8% "IJQS7 a zmlwarmimsibie 3 :1 63minof the name-35mins fie fluid. from saiii chambez [0 the 1.v item of expansible chamber. snbsfani'ial'iy as specified.

I; a, file-anal TBOQJOCYTL cyfil'ler having an upper m3 lower Clkibei, a pisim: e r'i'inc'ier cm'nmunicmbing v: 11 saii. imper ami, 'Emmr chamn tlsq a pision in said Easc namad 0} indie? adaptafl to be acte'i upon by iiqfid in she lower chamber, :m a valve 5 5 a controfiing the cmnnmnication through Q i saiqi pismn cylinriete between szzi6i upper and hid], S ark iowec chxmbers. v 15 4; in a thermai motona cylinder mntaining a fluid subject a Expansion "(nigh changes in atmospheric temperatnm and a non--expamible fluid below said psmsilfle fiiific iq an overfiew ireservoirnhove sum cy'iinc'ier ar nm-ex'pansibie fluid.

inmfiar member snbmamed in said expnnsibie 21116; nanexpansibie fluids, anti ham h an n'verflnw opening" c'iisclmrqzinsr into the reservsir for the.Imrvexpnnsible fluid, a pis'mn and 50d in said tubular mezmer ex- 1 posed to the action 0f the rmmarcpimsible "nrmugi'l fiuii when acted upon by expansion of the expansible fluid, a tubular member prov'idn1 testiiiiony whereof I afiix my signature. ing it communication between the non-exin presence of two witnesses. pzinsible fluid reservoir and the portion of AUGUST G SCHVVIETERMAN the main cylinder below the expansible fluid contained therein, and a valve in said last Witnesses:

named tubular member controlling said MELLIE GALLOWAY, communication, substantially as specified. MATTHEW SIEBLER. 

